Earnings Per Share Information (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Oct. 31, 2021	Jul. 31, 2021	Apr. 30, 2021	Jan. 31, 2021	Oct. 31, 2020	Jul. 31, 2020	Apr. 30, 2020	Jan. 31, 2020	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2019
Earnings Per Share [Abstract]
Net income as reported	$ 374,330	$ 234,932	$ 127,866	$ 96,499	$ 199,317	$ 114,761	$ 75,670	$ 56,876	$ 833,627	$ 446,624	$ 590,007
Basic weighted-average shares	122,218	123,826	124,295	126,060	127,310	126,722	128,205	138,145	124,100	130,095	145,008
Common stock equivalents									1,707	1,152	1,493
Diluted weighted-average shares	124,057	125,610	125,999	127,562	128,892	127,399	128,809	139,889	125,807	131,247	146,501
Debt Instrument [Line Items]
Shares Issued under Stock Incentive and Employee Stock Purchase Plans									1,011	1,541	1,394
Restricted Stock Units RSU And Employee Stock Option Member [Member]
Debt Instrument [Line Items]
Weighted average number of anti-dilutive options and restricted stock units									166	2,141	1,156